Sequelize, all versions prior to version 4.44.3 and 5.15.1, is vulnerable to SQL Injection due to sequelize.json() helper function not escaping values properly when formatting sub paths for JSON queries for MySQL, MariaDB and SQLite.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)